In message , Rob Morley
writes
In article , "raden"
says...
snip

I hate to think UK.D-I-Y might have been defeated

In the true spirit of DIY, why not make your own? Rubber tube down
the middle and a couple of washers stamped out of foam.

What, 1000 of them ?

This isn't for a hobby, it's for professional use. While it's cost
effective to pay 30 odd pence/unit, it seems to me to be a lot of money
for what they are

--
geoff